Mandrel support



Aug. 12 1924.

G. L MATHER MANDREL SUPPORT Filed Oct. 2'7

2 Sheets-Shet 1 G; L. MATHER MANDREL SUPPORT Fild oct. 27;

2 Sheets-Sheet 2 Patented Aug. 12, 1924.

UNITEE STTES PATENT OFFIE.

GEORGE L. MATHER, OF MILWAUKEE, \VISCONSIN, ASSIGNOR TO THE FEDERAL RUB- BER COMPANY, OF GUIDAI-IY, WISCONSIN, A CORPORATIGN OF MASSACHUSETTS.

MANDREL SUPPORT.

Application filed October 27, 1921.

To all whom it may concern.

Be it known that I, GEORGE L. Mn'rnnn, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Mandrel Supports, of which the following is a specification.

My invention relates to mandrel supports and the principal object of my invention is to provide a support which will automatically close the end of the mandrel supported thereby. In the drawings accompanying this specification and forming a part thereof I have shown, for the purposes of illustration, one form which my invention may assume. In these drawings:

Figure 1 represents a front elevation of this illustrative embodiment,

Figure 2 represents a side View of the often stripped from the mandrel by turning back by hand the end of the article, placing an air nozzle under the turned-back cuff and inserting air in the pocket underneath the cui'f, and then utilizing the air pressure to expand the pocket by lengthening the cuff and thus stripping the article from the mandrel. When the article is about half stripped the cuff will reach to the end of the mandrel and if the mandrel is hollow the space within the mandrel will become part of the pocket and unless this space be closed it will provide an opening of such extent that the air will no longer be able to expand the pocket. This space may be closed by plugs driven lYltO the mandrel but such plugs must in practice remain in the mandrel at all times and accordingly will be in the mandrel during the vulcanization of the tube and will prevent a free flow of fluid through the mandrel and thus tend to cause uneven vulcanization. My invention eliminates this diiliculty by closing the mandrel only dur ing the stripping process.

The embodiment illustrated in the drawings comprises a pair of plates 11 secured to any suitable support 12 and carrying a pair of trunnions 13 adapted to support a Serial No. 510,982.

framework 14 which comprises the two side plates 15 which receive the trunnion, a pair of cross-pieces 16 secured to and spacing the side plates 15, a lower socket plate 17 se cured to the lower cross-piece 16, and an upper socket plate 18 supported by the upper cross-piece l6 and adjustable by means of a screw 19 operating in the upper crosspiece 16. The two socket plates 17 and 18 are adapted to receive the end of the mandrel as shown in Figure 3.

The plates 11 also carry a second pair of trunnions 20 on which are mounted a pair of levers 21 pivotally carrying at their up per ends a block 22 provided with a cushion 23. A pair of links 24 connect the side plates 15 with the lower ends of the levers 21 and the proportions of the parts are such that forward tilting of the framework 14 causes the block 22 and cushion 23 to be advanced at a more rapid rate to thereby move the cushion 23 closer to the framework 14.

In operation the mandrel 25 carrying the tube 26 is placed in position between the socket plates 17 and 18 and abutting the cushion 23, all as shown in Figure 3, and is then allowed to drop under the action of gravity into the position shown in Figure 4 wherein it has tilted forward the framework 14 and by means of the links 24 has moved the cushion 23 in firm engagement with the end of the mandrel. Further downward movement of the mandrel is prevented. by the pressure of the cushion 23 against the end of the mandrel and by the action of the tension springs 27 connecting the upper end of the framework 14 with studs 28 on the side plates 11. It will be apparent that in this position the cushion 23 effectively seals the opening in the mandrel.

I have described herein one embodiment which my invention may assume. This description is, however, illustrative only and my invention is not limited thereto.

I claim:

1. In combination, a mandrel support, and automatic means for sealing the end of a mandrel supported thereby.

2. In combination, a mandrel support, means for closing the end of a mandrel supported thereby, and means for operating said closing means effective upon the placing of a mandrel in supported position.

3. In combination, a mandrel support,

and means for closing the end of the man drel supported thereby operated by the placing of a mandrel in supported position.

4. In combination, a mandrel support and automatic means for sealing the end of a mandrel supported thereby, said sealing means being operated by movement of said support.

5. In combination, a 'mandrel support, and means for closing the end of the mandrel supported thereby, said closing means being operated by movement of said support When a mandrel is placed in position.

6. In combination, a pivoted mandrel support, means for closing the end of a mandrel supported thereby said closing means comprising a pivoted cushion member operatively connected to said pivoted support whereby tilting of said pivoted support causes said cushion to engage the end of the mandrel.

In testimony whereof I have signed my name to the above specification.

GEORGE L. MATHER.

Certificate of Correction.

It is hereby certified that Letters Patent No. 1,505,052, granted August 12, 1924:, upon the application of George L. Mather, of Milwaukee, Visconsin, for an improvement in Mandrel Supports, were erroneously issued to The Federal Rubber Company, of Cudahy, Visconsin, a corporation of Massachusetts, whereas said Letters Patent should have been issued to The Fish Rubber Company, of Citioopee Falls, zlfassaohasotts, a corporation of Massachusetts, said corporation, being assignee, by mosno assignments, of the entire interest in said invention, as shown by the records of assignments in this ofiice; and that the said Letters Patent should be read with this correction. therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of October, A. D. 19%.

[SEAL] KARL FENNING,

Acting Commissioner of Patents. 

